Sounds like as a part of the problem she is also dealing with vestibular disease which you can read about here
http://www.cathealth.com/vestibular.htm
For that and the myositis steroids may help reduce symptoms.
You might try pureeing her food so she can lap it up.
Scroll down on this page
http://www.familyvet.com/Cats/Muscle.html
to POLYMYOSITIS topic to see info on treatment and then to info on INFECTIOUS MYOSITIS below it.
Toxoplasmosis is a disease that can trigger this condition but its not a common side effect. You can read about Toxoplasmosis here
http://www.fabcats.org/owners/toxoplasmosis/info.html
Hope this helps you!
Unacceptable. Knew all this on the word "go". Thanks anyway.
It is impossible for us to know what you do and do not know without you telling us.
We can only answer what you ask and you asked for "ANY HELP YOU CAN OFFER. "
And I supplied you with information on her dizziness, the disease, a way to get more food into her and possible triggers for the problem.
Cat Health, Behavior, Care Expert
30+ years cat owner, rescue, breeding, study of behavior & health care